Exercise platform



FIG. 1 is a top plan view of the ornamental exercise platform of the invention;

FIG. 2 is a front end view of the exercise platform of the invention;

FIG. 3 is a rear end view of the exercise platform of the invention; and,

FIG. 4 is a bottom plan view of the exercise platform of the invention.

The broken line portions of the drawing disclosure are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for an exercise platform, as shown and described. 